Array.$ ()
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Array Aggregate Function to Entire Array
Array.$_(Function|Array of Functions[,param1,param2,...])
This returns the result of all of the Array being operated on by the function or array of functions passed. The parameters provided following the function/function array is passed to the function with all elements of array as the first parameter. Used for aggregate functions or functions that apply on entire array.
For example, a=|4,4,1..10|
| 1 | 2 | 3 | 4 |
| 5 | 6 | 7 | 8 |
| 9 | 10 | 1 | 2 |
| 3 | 4 | 5 | 6 |
a.$_(SUM)
76
Functions can be defined as a string with a variable, say, x. The function may depend on x[a1,a2] etc accessors for the element at a1, a2.
a.$_("x[1][1]+x[2][2]")
7